when I tried to start my first Cassandra service instance, i got following 
error 
message, 

JavaBean=org.apache.cassandra.config.Config@7c2e1f1f; No single argument 
constructor found for class [Ljava.lang.String;
 in "<reader>", line 10, column 1:
    cluster_name: 'testCluster'

I have Java 1.6 and set commitlog, data and saved_caches in cassandra.yxml


full log:


INFO [main] 2012-05-14 13:05:43,655 AbstractCassandraDaemon.java (line 100) 
Logging initialized
 INFO [main] 2012-05-14 13:05:43,659 AbstractCassandraDaemon.java (line 121) 
JVM 
vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_26
 INFO [main] 2012-05-14 13:05:43,659 AbstractCassandraDaemon.java (line 122) 
Heap size: 1060372480/1060372480
 INFO [main] 2012-05-14 13:05:43,659 AbstractCassandraDaemon.java (line 123) 
Classpath: C:\apache-cassandra-1.1.0\conf;C:\apache-cassandra-1.1.0\lib\antlr-
3.2.jar;C:\apache-cassandra-1.1.0\lib\apache-cassandra-1.1.0.jar;C:\apache-
cassandra-1.1.0\lib\apache-cassandra-clientutil-1.1.0.jar;C:\apache-cassandra-
1.1.0\lib\apache-cassandra-thrift-1.1.0.jar;C:\apache-cassandra-1.1.0\lib\avro-
1.4.0-fixes.jar;C:\apache-cassandra-1.1.0\lib\avro-1.4.0-sources-
fixes.jar;C:\apache-cassandra-1.1.0\lib\commons-cli-1.1.jar;C:\apache-
cassandra-
1.1.0\lib\commons-codec-1.2.jar;C:\apache-cassandra-1.1.0\lib\commons-lang-
2.4.jar;C:\apache-cassandra-1.1.0\lib\compress-lzf-0.8.4.jar;C:\apache-
cassandra-1.1.0\lib\concurrentlinkedhashmap-lru-1.2.jar;C:\apache-cassandra-
1.1.0\lib\guava-r08.jar;C:\apache-cassandra-1.1.0\lib\high-scale-lib-
1.1.2.jar;C:\apache-cassandra-1.1.0\lib\jackson-core-asl-1.9.2.jar;C:\apache-
cassandra-1.1.0\lib\jackson-mapper-asl-1.9.2.jar;C:\apache-cassandra-
1.1.0\lib\jamm-0.2.5.jar;C:\apache-cassandra-1.1.0\lib\jline-
0.9.94.jar;C:\apache-cassandra-1.1.0\lib\json-simple-1.1.jar;C:\apache-
cassandra-1.1.0\lib\libthrift-0.7.0.jar;C:\apache-cassandra-1.1.0\lib\log4j-
1.2.16.jar;C:\apache-cassandra-1.1.0\lib\metrics-core-2.0.3.jar;C:\apache-
cassandra-1.1.0\lib\servlet-api-2.5-20081211.jar;C:\apache-cassandra-
1.1.0\lib\slf4j-api-1.6.1.jar;C:\apache-cassandra-1.1.0\lib\slf4j-log4j12-
1.6.1.jar;C:\apache-cassandra-1.1.0\lib\snakeyaml-1.6.jar;C:\apache-cassandra-
1.1.0\lib\snappy-java-1.0.4.1.jar;C:\apache-cassandra-1.1.0\lib\snaptree-
0.1.jar;C:\apache-cassandra-1.1.0\build\classes\main;C:\apache-cassandra-
1.1.0\build\classes\thrift;C:\apache-cassandra-1.1.0\lib\jamm-0.2.5.jar
 INFO [main] 2012-05-14 13:05:43,662 CLibrary.java (line 66) JNA not found. 
Native methods will be disabled.
 INFO [main] 2012-05-14 13:05:43,670 DatabaseDescriptor.java (line 127) 
Loading 
settings from file:/C:/apache-cassandra-1.1.0/conf/cassandra.yaml
ERROR [main] 2012-05-14 13:05:43,762 DatabaseDescriptor.java (line 479) Fatal 
configuration error error
Can't construct a java object for 
tag:yaml.org,2002:org.apache.cassandra.config.Config; exception=Cannot create 
property=data_file_directories for 
JavaBean=org.apache.cassandra.config.Config@7c2e1f1f; No single argument 
constructor found for class [Ljava.lang.String;
 in "<reader>", line 10, column 1:
    cluster_name: 'testCluster'
    ^

        at 
org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct
(Constru
ctor.java:372)
        at 
org.yaml.snakeyaml.constructor.BaseConstructor.constructObject
(BaseConstructor.j
ava:177)
        at 
org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument
(BaseConstructor
.java:136)
        at 
org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData
(BaseConstructor.jav
a:122)
        at org.yaml.snakeyaml.Loader.load(Loader.java:52)
        at org.yaml.snakeyaml.Yaml.load(Yaml.java:166)
        at 
org.apache.cassandra.config.DatabaseDescriptor.loadYaml
(DatabaseDescriptor.java:
143)
        at org.apache.cassandra.config.DatabaseDescriptor.<clinit>
(DatabaseDescriptor.java:118)
        at 
org.apache.cassandra.service.AbstractCassandraDaemon.setup
(AbstractCassandraDaem
on.java:126)
        at 
org.apache.cassandra.service.AbstractCassandraDaemon.activate
(AbstractCassandraD
aemon.java:353)
        at 
org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:106)
Caused by: org.yaml.snakeyaml.error.YAMLException: Cannot create 
property=data_file_directories for 
JavaBean=org.apache.cassandra.config.Config@7c2e1f1f; No single argument 
constructor found for class [Ljava.lang.String;
        at 
org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.constructJavaBean2n
d
Step(Constructor.java:305)
        at 
org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.construct
(Constructo
r.java:184)
        at 
org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct
(Constru
ctor.java:370)
        ... 10 more
Caused by: org.yaml.snakeyaml.error.YAMLException: No single argument 
constructor found for class [Ljava.lang.String;
        at 
org.yaml.snakeyaml.constructor.Constructor$ConstructScalar.construct
(Constructor
.java:419)
        at 
org.yaml.snakeyaml.constructor.BaseConstructor.constructObject
(BaseConstructor.j
ava:177)
        at 
org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.constructJavaBean2n
d
Step(Constructor.java:298)
        ... 12 more

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